Photographic-printing apparatus.



No. 884,740. PATENTED APR.14.1908.

P. LATTA. PHOTOGRAPHIG PRINTING APPARATUS.

APPLIGATION I'ILKD 001. 7.1907.

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No. 884,740. PATENTED APR. 14, 190

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PHOTOGRAPHIG PRINTING APPARATUS.

APPLICATION TILED 0017,1907."

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PAUL LATTA, OF CHICAGO, ILIlINOIS.

PHOTOGRAPHIC-PRINTING APPARATUS.

Specification of Letters Patent.

Patented April 14, 1908.

Application filed October 7, 1907. Serial No. 396,255.

To all whom it may concern:

Be it known that I, PAUL LATTA, subject of the Emperor of Germany,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Photographic -PrintingApparatus, of which the following is a specification.

This invention relates to a photographicprinting apparatus of that kindin which successive sections of a band of sensitized paper are exposedto a negative, the paper during exposure being pressed against thenegative.

The invention relates more particularly to the means whereby thesensitized paper is pressed against the negative, the object being topress the paper smoothly and evenly thereagainst, in order that a sharpand clear print may be had.

In the accompanying drawings, Figure 1 is a front elevation of theapparatus partly broken away. Fig. 2 is a similar view show ing theparts in another position. Fig. 3 is a plan view of the platen.

Referring specifically to the drawings, a denotes the sup orting frameof the negative plate I) over w rich the band of sensitized paper 0travels. paper may be effected by any suitable mechanlsm. Successivesections of the paper are exposed to the light of electric lamps B orother illuminating means arranged beneath the negative. The platen forpressing the paper against the negative during exposure comprises anumber of sections 61 which are connected by hinges c. The latensections are carried by a vertically siding frame 7c,

having at its ends plates it provided with horizontally disposed slotsII in which work rollers Z carried on the ends of the outer platensections. The operation of the frame c to press the sensitized paperagainst the negative by means of the platen sections may be effected byany suitable mechanism, its particular construction not being essentialto the present invention. On the back of the platen sections, adjacentto and on both sides of their meeting edges, are secured Weights f, thepurpose of which is to normally hold the sections suspended in a bendbelow the frame 7c when the latter is in elevated position as shown inFig. 1.

The 0 eration of the apparatus is as follows he paper 0 having beenbrought into The feed motion of the v proper position above the negativeI), the frame is lowered until the platen sections engage the paper andpress it against the negative. The inner sections of the platen pressthe paper first and as the frame 7c continues to descend, the platensections gradually straighten out and evenly and uniformly press thepaper against the negative. The point of contact moves from the middleof the paper outwardly in opposite directions thus accomplishing thesame object as the ends of the fingers do when they are rubbed overthepaper. This movement of the platen effectually prevents wrinkling andcreasing of the paper and also eliminates air bubbles, all of which aredetrimental to a clear and sharp print. During this movement of theplaten sections the rollers Z travel outwardly in the slots II. Afterexposure, the frame is is elevated to remove the platen sections fromthe paper and enable the same to be fed forward for the next print. Whenthe frame is thus elevated, the platen sections drop down and assumetheir normal position shown in Fig. 1, they being assisted in this bythe weights During this movement of the platen sections, the rollers Ztravel inwardly in the slots H.

I claim 1. In a photographic-printing apparatus, a negative holder, aframe movable toward and from the negative holder, and a jointed platenloosely supported at its ends on the frame and slidable endwise thereon,and depending in a bend therefrom.

2. In a photographio printing apparatus, a negative holder, a framemovable toward and from the negative holder, and having guide slots, aplaten comprising hinged sections, and rollers carried by the outerplaten sections and mounted in the aforesaid guide slots.

3. In a photographic-printing apparatus, a negative holder, a framemovable toward and from the negative holder and having guideslots, and ajointed platen supported at its ends in the guide-slots and depending ina bend therefrom.

In testimony whereof I aflix my signature, in presence of two Witnesses.

PAUL LATIA.

I/Vitnesses:

W. J. RoBINsoN, H. G. BATCHELOR.

